Multiserver, Error: 500 Internal Servlet Error

Has anybody received the following error before when trying to access any
page on an application running under multiserver?

Error: 500
Internal Servlet Error:

java.lang.ClassCastException: sun.misc.Launcher$AppClassLoader
        at
com.lutris.appserver.server.httpPresentation.servlet.HttpPresentationServlet
.checkAutoReload(Unknown Source)
        at
com.lutris.appserver.server.httpPresentation.servlet.HttpPresentationServlet
.ensureAppIsRunning(Unknown Source)
        at
com.lutris.appserver.server.httpPresentation.servlet.HttpPresentationServlet
.serviceDirect(Unknown Source)
        at
com.lutris.appserver.server.httpPresentation.servlet.HttpPresentationServlet
.service(Unknown Source)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.tomcat.core.ServiceInvocationHandler.method(Unknown 
Source)
        at org.apache.tomcat.core.ServletWrapper.handleInvocation(Unknown 
Source)
        at org.apache.tomcat.core.ServletWrapper.handleRequest(Unknown Source)
        at org.apache.tomcat.core.Context.handleRequest(Unknown Source)
        at org.enhydra.servlet.servletManager.ServletManager.service(Unknown
Source)
        at
org.enhydra.servlet.connectionMethods.http.HttpHandler.doARequest(Unknown
Source)
        at
org.enhydra.servlet.connectionMethods.http.HttpHandler.processRequests(Unkno
wn Source)
        at org.enhydra.servlet.connectionMethods.http.HttpHandler.run(Unknown
Source)
        at java.lang.Thread.run(Thread.java:536)

No matter what page I try to pull up, this is the error I get. I have
checked and rechecked that all of the jars the conf file references exist
and are current, I've redeployed new jars multiple times, I've restarted the
app, I've removed and recreated the http connection for it, I've completed
removed the app from multiserver and reloaded it, as well as restarting
multiserver. No matter what I attempt, I end up with the same result.

We've even gone so far as to enable class loader debugging messages, but the
only lines mentioning an error are (this is a bit large):

2002.10.17 13:46:00: pcp,ERROR: cannot load servlet name: pcp
2002.10.17 13:46:00: pcp,CLASSLOAD: loadClass:
com.lutris.appserver.server.httpPresentation.servlet.HttpPresentationServlet
2002.10.17 13:46:00: pcp,CLASSLOAD: checking MultiClassLoader:
com.lutris.appserver.server.httpPresentation.servlet.HttpPresentationServlet
2002.10.17 13:46:00: pcp,CLASSLOAD: getResource loading:
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class
2002.10.17 13:46:00: pcp,CLASSLOAD:   checking:
"/usr/local/enhydra5.0/lib/pcp/pcp-20021017-1210.jar"
2002.10.17 13:46:00: pcp,CLASSLOAD: File not found:
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class: java.io.FileNotFoundException: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@ca470, or is
corrupt: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@ca470
2002.10.17 13:46:00: pcp,CLASSLOAD:   checking: "/usr/local/enhydra5.0/lib/"
2002.10.17 13:46:00: pcp,CLASSLOAD: File not found:
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class: java.io.FileNotFoundException: File,
/usr/local/enhydra5.0/lib/com/lutris/appserver/server/httpPresentation/servl
et/HttpPresentationServlet.class, does not exist or does not have read
permission
2002.10.17 13:46:00: pcp,CLASSLOAD:   checking:
"/usr/local/java/iexposure/iexposure-20021017-1208.jar"
2002.10.17 13:46:00: pcp,CLASSLOAD: File not found:
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class: java.io.FileNotFoundException: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@ffc686, or is
corrupt: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@ffc686
2002.10.17 13:46:00: pcp,CLASSLOAD:   checking:
"/usr/local/java/postgresql/pgjdbc2.jar"
2002.10.17 13:46:00: pcp,CLASSLOAD: File not found:
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class: java.io.FileNotFoundException: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@42bece, or is
corrupt: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@42bece
2002.10.17 13:46:00: pcp,CLASSLOAD:   checking:
"/usr/local/enhydra5.0/lib/build/dods.jar"
2002.10.17 13:46:00: pcp,CLASSLOAD: File not found:
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class: java.io.FileNotFoundException: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@fcfa52, or is
corrupt: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@fcfa52
2002.10.17 13:46:00: pcp,CLASSLOAD:   checking:
"/usr/local/enhydra5.0/lib/tools/soap/lib/soap.jar"
2002.10.17 13:46:00: pcp,CLASSLOAD: File not found:
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class: java.io.FileNotFoundException: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@961dff, or is
corrupt: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@961dff
2002.10.17 13:46:00: pcp,CLASSLOAD:   checking:
"/usr/local/java/multipart/multipart.jar"
2002.10.17 13:46:00: pcp,CLASSLOAD: File not found:
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class: java.io.FileNotFoundException: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@8b81e3, or is
corrupt: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@8b81e3
2002.10.17 13:46:00: pcp,CLASSLOAD:   checking:
"/usr/local/java/javamail/mail.jar"
2002.10.17 13:46:00: pcp,CLASSLOAD: File not found:
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class: java.io.FileNotFoundException: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@fc6e42, or is
corrupt: Entry,
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class, does not exist in zip file, java.util.zip.ZipFile@fc6e42
2002.10.17 13:46:00: pcp,CLASSLOAD:   not found:
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class
2002.10.17 13:46:00: pcp,CLASSLOAD: getResource not found:
com/lutris/appserver/server/httpPresentation/servlet/HttpPresentationServlet
.class
2002.10.17 13:46:00: pcp,CLASSLOAD: class not loaded by MultiClassLoader:
com.lutris.appserver.server.httpPresentation.servlet.HttpPresentationServlet
2002.10.17 13:46:00: pcp,CLASSLOAD: checking secondary class loader:
com.lutris.appserver.server.httpPresentation.servlet.HttpPresentationServlet
2002.10.17 13:46:00: pcp,CLASSLOAD: class loaded by: secondary

And of course, it appears that in the end the class is loaded anyway. This
is truly baffling us, and we're running out of ideas. Does anybody know what
is going on here? No other sites on the same server exhibit this same
problem, and they are all similarly configured.

--
Chuck Rector
Internet Exposure, Inc.
http://www.iexposure.com
crector@xxxxxxxxxxxxx

Web Development - Web Marketing - ISP Services
(612) 676-1946